Former Lost star Evangeline Lilly is thought to have welcomed her second child into the world.

Actress Evangeline Lilly has reported given birth to her second child.

The former Lost star sparked speculation she is now a mother-of-two after she was photographed wearing a bikini and showing off a smaller belly on a beach in Kauai, Hawaii, on Wednesday (21Oct15), suggesting she is no longer with-child.

A representative for the actress has yet to comment on the birth reports.

The 36-year-old star revealed she was expecting in June (15), when she attended the Los Angeles premiere of her film Ant-Man sporting a fuller figure.

At the time, Evangeline explained she was "about seven months" pregnant and she and her boyfriend Norman Kali had no idea whether they were expecting a brother or sister for their four-year-old son Kahekili.

"We don't know this time; we didn't know last time," she previously explained. "Last time I had to find out that I had had a son because I'd given birth and I was holding my beautiful baby in my arms, looking at the beautiful, perfect face... and I heard my partner, Norman, say, 'Holy cow, look at the size of the balls on that kid!'"

The star has plans for a large family, explaining once she'd revealed her second pregnancy that she originally wanted six children. She feels lucky as she enjoys expecting, although when she was younger she'd always assumed she would adopt four kids.

"My partner and I have really been through the ringer in the adoption world and it's hard, so we'll see what happens," she told Ocean Drive magazine earlier this year. "Life is magically beautiful, and it brings you what is perfect."

Marriage is of less interest to her though, with the star happy not to have walked down the aisle. She met Norman on the set of Lost and sees no reason to sign a piece of paper to prove her love, insisting neither of them feels the "emotional need" for it. Evangeline was married to Murray Hone between 2003 and 2004.